Smoke-consumer.



R. J. W. DWINNELL.

SMOKE CONSUMER.

APPLICATION FILED JAN. 17, 1907.

Patented Apr. 20, 1909.

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O Q A 0 e H t 1 THE Npmzls PETERS co, WASHINGT R. J. w. DWINNELL.

SMOKE CONSUMER.

APPLICATION FILED JAN. 17,1907 91 ,51 Patented A 20, 1909.

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R. J. W. DWINNELL.

SMOKE GONSUMER. APPLIUATION FILED IJAN.17, 1907.

918,518. ,Patented Apr. 20, 1909.

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UNITED STATES ATENT @FFTGE.

RICHARD JOHN WALTER DWINNELL, OF MONTREAL, QUEBEC, CANADA, ASSIGNOR TO THE PERFECT SIMPLEX COMBUSTION COMPANY, OF MONTREAL,

,ANADA.

SMOKE-CONSUMER.

To all whom it may concern:

Be it known that I, RICHARD JOHN NAL- TER DWINNELL, of the city of Montreal, Province of Quebec, Canada, have invented certain new and useful Improvements in Smoke-Consumers; and I do hereby declare that the following is a full, clear, and exact description of the same.

This invention relates particularly to smoke consumers of the type located at the rear of the fire chamber, and it has for its object to provide a device of this nature ada ted to thoroughly mix the products of com ustion with air during their passage from the space above the fire grate to the space behind the bridge wall and at the same time concentrate the mixture of gases and air at this oint in the fire zone, with the result that a inflammable gases are ignited or burned before they enter the tubes.

The invention may be said briefly to consist of the combination and arrangement of parts hereinafter described and pointed out in the claims. For full comprehension, however, of my invention, reference must be had to the accompanying drawings, forming a part of this specification, in which similar reference characters indicate the same parts and wherein Figure l is a longitudinal vertical sectional view of the furnace of a tubular boiler, with my invention applied thereto Fig. 2 is a sectional view thereof taken on line A A Fig. 1 and Fig. 3 is a similar view to Fig. 1 of a modification of my invention. Fig. 4 is a horizontal sectional view taken on line B B Fig. 1.

The forward face of the bridge-wall b is concaved as at c and the upper edge thereof is extended forwardly as at d, while a baffling member is supported by a pier c a short distance in advance of the bridge-wall and it presents a rearwardly projecting horizontal rib f with its underside concaved as at g. An

auxiliary grate 76, formed of a pair of grate sections and constituting a continuation of the main grate m, is located beneath the baffling member and extends from the pier to each side of the fire chamber; and a pair of air flues, n and 0, are formed in the rear Wall of the furnace beneath and communieating with the said auxiliary grates.

To meet certain requirements the baffling member is constructed in the form of a twyer, in that it is made hollow and down- Specification of Letters Patent.

Application filed January 17, 1907.

Patented April 20, 1909.

Serial No. 352,819.

wardly tapering with a discharge opening in its lower end and it is fed with heated pure air by flues q in the side walls of the furnace such .tlues communicating with the ash pit at points 7' within the lines n and o.

The rib f and forward extension (1 of the bridge-wall form a contracted passage for the products of combustion and air mixed, and a twyer-like effect is produced thus intensifying the heat at this point and rendering the consumption of the inflammable gases and small particles of carbon carried thereby, more perfect.

Under ordinary conditions the air admitted through the auxiliary grate sections to the chamber presented by the concavity in the bridge-wall is sutlicient to insure perfect combustion, but under certain conditions, for instance where it is the practice to burn a very volatile fuel, the air supplied through the bafller increases the efliciency of the furnace.

hat I claim is as follows 1. The combination with the lire chamber and bridge wall of a furnace, of a transverse baflier extending downwardly from the roof of the fire chamber and adjacent to the bridge wall, a fire grate extending between the front of the fire chamber and bridge wall and beneath the bafller and presenting a passage therebetween and the said baffler, and means projecting from the said baffler and contracting the upper portion of the passage between the ba-filer and bridge wall to less capacity than the lower portion of such pas sage.

2. The combination with the bridge wall of a furnace, such bridge wall having a con cavity in its forward face, of a baii'ler extending across the furnace adjacent to the bridge wall and having a rib upon its rear side extending parallel to the upper edge of the bridge wall, and means for supplying pure air to the space between the bridge wall and baffler.

3. The combination with the bridge wall of a furnace, such bridge wall having a for ward extension along its upper edge, of a baffler extending across the furnace adjacent to the bridge wall and having a rib upon its rear side extending parallel to the upper edge of 2 eisfsis of a furnace, such bridge wall having a concavity in its forward face, and a forward extension along its upper edge of a baflier extending across the furnace adjacent to the bridge wall and having a rib upon its rear side extending parallel to the upper edge of the bridge Wall, and means for supplying pure air to the space between the bridge wall and baffler.

5. The combination with the bridge-wall of a furnace, such bridge-wall having a concavity in its forward face, of a baffler extending across the furnace adjacent to the bridge wall and having a rib upon its rear side extending parallel to the upper edge of the bridge wall, and a pair of flues formed in the rear wall of the furnace for supplying pure air to the space between the bridge wall and baffler.

6. The combination with the bridge wall of a furnace of a hollow bafiler adjacent to the said bridge wall and consisting of a pair of downwardly converging plates and a cover plate; a baffle-wall extending upwardly from the said hollow bafller, flues supplying air through the bafder to the space between the latter and the bridge wall, and means supply- 7 ing air directly to the said space.

7. The combination with the bridge wall of a furnace of a hollow baflier adjacent to the said bridge wall, flues supplying air through the bafller to the space between the latter and the bridge wall, and means supplying air directly to the said space, and means for contracting the passage iroin the said space, such means consisting of a forward extension upon the top edge of the bridge wall and a rearwardly extending horizontal rib upon the bafller.

8. The combination with the bridge wall of a furnace, of a hollow bafi ler adjacent to the said bridge wall and consisting of a pair of downwardly converging plates and a cover plate a baffle-wall extending upwardly from the said hollow bafller, fiues su plying air through the baffler to the space etween the latter and the bridge wall, and means supplying air directly to the said space, and means for contracting the passage from the said space consisting of a forward extension upon the top edge of the bridge wall and a rearwardly extending horizontal rib upon the baflier,

In testimony whereof, I have signed my name to this specification, in the presence of 55 two subscribing witnesses.

RICHARD JOHN WALTER DWINNELL. Witnesses:

ANsoN H. CAMPBELL, J. F. REDDY. 

